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    What is meant if this light comes on while driving?

    DVSA-style practice question · Safety and your Vehicle

    Illustration for the theory test question: What is meant if this light comes on while driving?

    The answer options

    • Your seat belt is not fastened
    • Your engine oil level is low
    • Your headlight has failed
    • There is a fault in the braking systemCorrect

    Why the other options are wrong

    • “Your seat belt is not fastened” is a distractor. It does not meet the standard the question is testing, which there is a fault in the braking system does. Picking it in the real test costs a mark you cannot get back, and with a pass mark of 43 out of 50 you only have seven to spare.
    • “Your engine oil level is low” is a distractor. It does not meet the standard the question is testing, which there is a fault in the braking system does. Picking it in the real test costs a mark you cannot get back, and with a pass mark of 43 out of 50 you only have seven to spare.
    • “Your headlight has failed” is a distractor. It does not meet the standard the question is testing, which there is a fault in the braking system does. Picking it in the real test costs a mark you cannot get back, and with a pass mark of 43 out of 50 you only have seven to spare.

    Why that is the answer

    This red warning symbol indicates a fault in your braking system, such as dangerously low brake fluid or a mechanical issue. If it illuminates while driving, DVSA guidance advises you to stop safely as soon as possible and investigate. You should not confuse this symbol with the engine oil light, which looks like an oil can, or the seatbelt warning, which shows a seated figure.

    What safety and your vehicle covers

    • · Legal minimum tread depth of 1.6mm across the central three-quarters
    • · Dashboard warning lamp colours and which mean stop immediately
    • · Braking, steering and suspension faults and how they feel
    • · Fuel economy, emissions and eco-safe driving technique

    Mistakes learners repeat on this topic

    • · Quoting 1.6mm as an all-weather safe depth rather than the legal minimum
    • · Checking tyre pressures when the tyres are hot instead of cold
    • · Treating an amber warning lamp as something to ignore
    • · Forgetting that an over-inflated tyre wears in the centre, not the edges

    Instructor tip: Learn the warning lamp colours as a traffic-light system: red stop, amber investigate, green or blue informational.

    How this comes up in the real test

    Questions from safety and your vehicle appear throughout the 50-question multiple-choice section, and the wording changes between versions. Learn the rule rather than the sentence: the DVSA can ask the same point from the opposite direction, and a memorised answer falls over the moment the phrasing moves.

    The pass mark is 43 out of 50, so seven wrong answers is your entire margin. If a whole category is shaky, run the topic practice below until you are getting every question right for the right reason, then go back to full mocks under the clock.

    Practise Safety and your VehicleSit a full mock test

    More safety and your vehicle questions

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